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Answer:
1 18x³- 8x³= 10x³
2 -8x²- +16x²= -24x²
3 -9/4ab². - -3/2ab² = -9 - 6 / 4 = -15/4ab²
4 16/15x²y - -8/5x²y = 16 - - 24 / 15 = -30/15 = -2 x²y
Answer:
Subtract:-
I). 8x³ from 18x³
= 18x³-8x³
= 10x³. ans.....
ii). 16x² from -8x²
= -8x² - 16x²
= -24x². ans.....
iii). (-3/2)ab² from (-9/4)ab²
= (-9/4)ab² - (-3/2)ab²
= (-9/4)ab² + (3/2)ab²
= (-9+6/4)ab²
= (-3/4)ab². ans .....
iv). (-8/5)x²y from (16/15)x²y
= (16/15)x²y - (-8/5)x²y
= (16/15)x²y + (8/5)x²y
= (16+24/15)x²y
= (40/15)x²y. ans.....